Would like to enter Canada but have one Felony DUII, and six…

Hello
If you can receive a pardon for each and every criminal offence, then you will be admissible to enter Canada. You would need to apply for the pardons according to U.S. law.
If you do not yet have pardons, your admission into the country would possibly not be permitted until you receive confirmation of rehabilitation from a prior criminal offence by the Canadian government.
You need to apply for a rehabilitation as a result of prior criminal record. If you do not do so, there is a chance the border agents will refuse your entry. They may not, but you cannot know for certain until at the border. It is in their discretion to refuse entry. You cannot get advance confirmation of whether you will be allowed entry or not without a formal rehabilitation from the Canadian government. But with a felony and numerous misdemeanors it is not likely.
There are two ways to apply for the rehabilitation.
You must be first past the required waiting period that must take place from time of conviction until you can apply for the rehabilitation. That runs from 10 years after any sentence or probation has ended. You can then apply at the border for a deemed rehabilitation.You would need to take with you documents to confirm your conviction and sentence and a copy of a criminal record. The government will not guarantee that you will be granted a deemed rehabilitation though. This still remains in the discretion off the border official, although it would be rare that admission would be refused for minor offenses like yours occurring long ago.
The other option is to apply to the Canadian government ahead of time for an individual rehabilitation. This basically involves sending them similar information and paying an application fee.
Here is a web address to the specific federal government website that explains the process for each kind of application:
www.cic.gc.ca/english/information/applications/rehabil.asp
If you are not yet past the 10 years waiting period to seek a rehabilitating, then the only way to enter will be to seek a Temporary Residence permit. But with multiple convictions, that is extremely unlikely to be granted.
Unfortunately, there is no guaranteed way that you will be able to enter the country without doing one of these procedures. Please review the above, and if you have another specific question for me I will try to answer it.